nu-table/ 1 refactoring + a few optimizations + small fix (#15653)

- A few days back I've got this idea regarding recalculus of width.
Now it calculates step by step.
So 1 loop over all data was removed.
All though there's full recalculation in case of `header_on_border`
😞 (can be fixed..... but I decided to be short)

In perfect world it also shall be refactored ......

- Also have done small refactoring to switch build table from
`Vec<Vec<_>>>` to table itself. To hide internals (kind of still there's
things which I don't like).
It touched the `--expand` algorithm lightly you can see the tests
changes.

- And when doing that noticed one more opportunity, to remove HashMap
usage and directly use `tabled::ColoredConfig`. Which reduces copy
operations and allocations.

- And fixed a small issue where trailing column being using deleted
column styles.


![image](https://github.com/user-attachments/assets/19b09dba-c688-4e91-960a-e11ed11fd275)

To conclude optimizations;
I did small testing and it's not slower.
But I didn't get the faster results either.
But I believe it must be faster well in all cases, I think maybe bigger
tables must be tested.
Maybe someone could have a few runs to compare performance.

cc: @fdncred

crates/nu-command/src/viewers/table.rs

@@ -17,8 +17,8 @@ use nu_protocol::{
     Signals, TableMode, ValueIterator,
 };
 use nu_table::{
-    common::configure_table, CollapsedTable, ExpandedTable, JustTable, NuRecordsValue, NuTable,
-    StringResult, TableOpts, TableOutput,
+    common::configure_table, CollapsedTable, ExpandedTable, JustTable, NuTable, StringResult,
+    TableOpts, TableOutput,
 };
 use nu_utils::{get_ls_colors, terminal_size};
 
@@ -609,7 +609,7 @@ fn build_table_kv(
     span: Span,
 ) -> StringResult {
     match table_view {
-        TableView::General => JustTable::kv_table(&record, opts),
+        TableView::General => JustTable::kv_table(record, opts),
         TableView::Expanded {
             limit,
             flatten,
@@ -645,7 +645,7 @@ fn build_table_batch(
     }
 
     match view {
-        TableView::General => JustTable::table(&vals, opts),
+        TableView::General => JustTable::table(vals, opts),
         TableView::Expanded {
             limit,
             flatten,
@@ -1090,9 +1090,9 @@ fn create_empty_placeholder(
         return String::new();
     }
 
-    let cell = NuRecordsValue::new(format!("empty {}", value_type_name));
-    let data = vec![vec![cell]];
-    let mut table = NuTable::from(data);
+    let cell = format!("empty {}", value_type_name);
+    let mut table = NuTable::new(1, 1);
+    table.insert((0, 0), cell);
     table.set_data_style(TextStyle::default().dimmed());
     let mut out = TableOutput::from_table(table, false, false);